
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>列表过滤</title>
    <script src="../commonjs/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入姓名" v-model="keyWord">
        <ul>
            <li v-for="person in filterPersons" :key="person.id">
                {{person.name}}-{{person.age}}--{{person.sex}}
            </li>
        </ul>
    </div>
    <script>
        Vue.config.productionTip = false;//关闭开发提示
        new Vue({
            el:'#root',
            data:{
                persons:[
                    {id:'001',name:'周冬雨',age:18,sex:"女"},
                    {id:'002',name:'马冬梅',age:19,sex:"女"},
                    {id:'003',name:'周杰伦',age:20,sex:"男"},
                    {id:'004',name:'王卓伦',age:21,sex:"男"},
                ],
                // filterPersons:[],  //watch实现时需要用
                keyWord:''
            },
            methods:{
            },
            //computed实现数据过滤
            computed:{
                filterPersons(){
                    return this.persons.filter((person)=>{
                        return person.name.indexOf(this.keyWord) !== -1
                    })
                }
            }
            //watch实现数据过滤
/*            watch:{
                keyWord:{
                    immediate:true,//实时监视 不然第一次打开因为输入框是空串无法匹配，数据显示为空
                    handler(val){
                        this.filterPersons = this.persons.filter((person)=>{
                            return person.name.indexOf(val) != -1
                        })
                    }
                }
            }*/
        })
    </script>
</body>
</html>